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[X86][MMX] Add tests for MMX extract element

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LLVM ToT produces poor MMX code compared to 3.5. However, part of the previous
functionality can be achieved by using -x86-experimental-vector-widening-legalization.
Add tests to be sure we don't regress again.

llvm-svn: 227869
This commit is contained in:
Bruno Cardoso Lopes 2015-02-02 22:00:48 +00:00
parent 21e97803f6
commit b2e29f9645
1 changed files with 75 additions and 0 deletions
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test/CodeGen/X86/vec_extract-mmx.ll Normal file
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; RUN: llc < %s -mtriple=x86_64-darwin -x86-experimental-vector-widening-legalization -mattr=+mmx,+sse2 | FileCheck %s
define i32 @test0(<1 x i64>* %v4) {
; CHECK-LABEL: test0:
; CHECK: ## BB#0:
; CHECK-NEXT: pshufw $238, (%rdi), %mm0
; CHECK-NEXT: movq2dq %mm0, %xmm0
; CHECK-NEXT: movd %xmm0, %eax
; CHECK-NEXT: addl $32, %eax
; CHECK-NEXT: retq
%v5 = load <1 x i64>* %v4, align 8
%v12 = bitcast <1 x i64> %v5 to <4 x i16>
%v13 = bitcast <4 x i16> %v12 to x86_mmx
%v14 = tail call x86_mmx @llvm.x86.sse.pshuf.w(x86_mmx %v13, i8 -18)
%v15 = bitcast x86_mmx %v14 to <4 x i16>
%v16 = bitcast <4 x i16> %v15 to <1 x i64>
%v17 = extractelement <1 x i64> %v16, i32 0
%v18 = bitcast i64 %v17 to <2 x i32>
%v19 = extractelement <2 x i32> %v18, i32 0
%v20 = add i32 %v19, 32
ret i32 %v20
}
define i32 @test1(i32* nocapture readonly %ptr) {
; CHECK-LABEL: test1:
; CHECK: ## BB#0: ## %entry
; CHECK-NEXT: movd (%rdi), %xmm0
; CHECK-NEXT: movaps %xmm0, -{{[0-9]+}}(%rsp)
; CHECK-NEXT: pshufw $232, -{{[0-9]+}}(%rsp), %mm0
; CHECK-NEXT: movq2dq %mm0, %xmm0
; CHECK-NEXT: movd %xmm0, %eax
; CHECK-NEXT: emms
; CHECK-NEXT: retq
entry:
%0 = load i32* %ptr, align 4
%1 = insertelement <2 x i32> undef, i32 %0, i32 0
%2 = insertelement <2 x i32> %1, i32 0, i32 1
%3 = bitcast <2 x i32> %2 to x86_mmx
%4 = bitcast x86_mmx %3 to i64
%5 = bitcast i64 %4 to <4 x i16>
%6 = bitcast <4 x i16> %5 to x86_mmx
%7 = tail call x86_mmx @llvm.x86.sse.pshuf.w(x86_mmx %6, i8 -24)
%8 = bitcast x86_mmx %7 to <4 x i16>
%9 = bitcast <4 x i16> %8 to <1 x i64>
%10 = extractelement <1 x i64> %9, i32 0
%11 = bitcast i64 %10 to <2 x i32>
%12 = extractelement <2 x i32> %11, i32 0
tail call void @llvm.x86.mmx.emms()
ret i32 %12
}
define i32 @test2(i32* nocapture readonly %ptr) {
; CHECK-LABEL: test2:
; CHECK: ## BB#0: ## %entry
; CHECK-NEXT: movq (%rdi), %mm0
; CHECK-NEXT: pshufw $232, %mm0, %mm0
; CHECK-NEXT: movq2dq %mm0, %xmm0
; CHECK-NEXT: movd %xmm0, %eax
; CHECK-NEXT: emms
; CHECK-NEXT: retq
entry:
%0 = bitcast i32* %ptr to x86_mmx*
%1 = load x86_mmx* %0, align 8
%2 = tail call x86_mmx @llvm.x86.sse.pshuf.w(x86_mmx %1, i8 -24)
%3 = bitcast x86_mmx %2 to <4 x i16>
%4 = bitcast <4 x i16> %3 to <1 x i64>
%5 = extractelement <1 x i64> %4, i32 0
%6 = bitcast i64 %5 to <2 x i32>
%7 = extractelement <2 x i32> %6, i32 0
tail call void @llvm.x86.mmx.emms()
ret i32 %7
}
declare x86_mmx @llvm.x86.sse.pshuf.w(x86_mmx, i8)
declare void @llvm.x86.mmx.emms()